Next build motor????

Then its pretty basic and should be a real easy deal to put together. You can have the cam re ground and use an adaptor for the cam snout to run a fuel pump eccentric or just use an electric fuel pump, cheapo one would be plenty.
As for the y block, some good ideas were in that motor...mains above the rail like ab rb motor...and some not so very good,like the heads.lol
The Y block is out, too long.